ZINC can be used as a standing seam panel for all vertical walls as well as soffits. The structure must be a cold ventilated one using either vented open gap boarding or on vented plywood (humidity classes 1 to 4). The vented air space must be at least 38mm wide. The panels can be installed vertically, horizontally or even diagonally but panel length should not exceed 4m. Although zinc standing seam panels are not as flat as some other façade systems it is possible to reduce unevenness by reducing panel width to 430mm and zinc thickness to 0.8mm. The use of a single lock also increases panel flatness.